How to study behavior, there are many ways, and each method is different depending on the nature of the problems that are studying. But all the methods are all the important. The knowledge acquisition of Science (Scientific Approach).The observation prove or trial. How GA รศึ skills., have the system can be controlled, has 10000 when, I. E., and peppermint, tailored, care, specific. The instruments used in the study were accuracy accurate reporting of the study, no prejudice.Reliable and can check for the study object, the habit of 5 ways as detailed below.
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